Fluid-filter



Patented Apr. 6, 1920.

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Wl R. KAHLENBERG.

FLUID FILTER.

APPLICATION FILED IAN. I2, 1920.

UNITED sTATEs PATENT OFFICE.

WILLIAM R.. KAHLENBERG, 0F TWO RIVERS, WISCONSIN, ASSIGNOR T0 KAIEIILIENBERGv BROS. CO., 0F TWO RIVERS, WISCONSIN.

FLUID-FILTER.

Specification ot Letters Patent.

Patented Apr. 6, 1920.

To all whom it may concern: l

Be it known that I WILLIAM R. KAHLEN- BERG, a citizen of they nited States, and resident of Two Rivers, inthe county of Manitowoc and State of Wisconsin, have invented certain new and useful Improvements in Fluid-Filters; and I do hereby declare that the following is a full, clear, and exact descri tion thereof.

y invention has for its object to provide a simple economical and effective filter for fluids and is especially designed for filtering or strainin oil for fuel purposes. In such instances t e filter is located in the suction or discharge pipe'of the oil pump to prevent the spray nozzle through which the oil is introduced into the engine from cloggmg.

Other objects of my invention are to provide an enlarged fluid passageway in the pipe system with annular grooves ntersected by longitudinal grooves which latter grooves terminate at predetermined distances from the opposite ends of the fluid passage to thus cause the uid to travel in zigzag form and function so as to trap foreign particles contained in the oil as it travels through the annular grooves, the said annular grooves being preferably of much finer mesh than the longitudinal grooves.

Another object of my invention is to provide a structure of the above referred to character with a removable plug having the longitudinal and annular grooves therein .with the purpose in mind of utilizing l plugs having different degrees of fneness of said grooves and to also render the device as a Whole readily accessible for cleaning purposes.

A still further advantage of providing a removable plug of this character is to reduce the cost of manufacture.

lllVith the above objects inview the invention consists in certain peculiarlties of con- A struction and combination of parts as set forth hereinafter with reference to the ac-v companying drawings and claimed.

In the accompanying drawings:

Figure 1 represents a sectional elevational view of a fluid filter embodying the features of my invention with the parts shown in full subsequently to more clearly illustrate certain structural features, and

Fig. 2 is a detail plan view of a preferred form of filter plug employed in carrying out my invention.

Referring by characters to the drawings 1 represents a casing having an intake duct 2 anda chamber 3 the walls of which are threaded at its upper end for the reception of a cap 4 provided with a discharge duct 5 communicating with a discharge pipe 8 in couple union with the cap.

In this exemplification of my invention the walls of the chamber are preferably smooth and are adapted to receive a snugly fitting removable :plug 7 which is dropped into place from the mouth of the chamber and located in a longitudinal direction, its lower end resting'upon a tapered shoulder 3,'formed in the bottom of the chamber and the upper end of a cap, which engages the just opposed end of said plug to firmly bind the same.

The upper end of the vided with a short shank into an enlarged portion of the discharge duct that is formed in the cap 4. The "removable plug 7 is provided with an annular spiral thread or groove which is preferably quite fine in pitch and the apex of these threads engages the smooth walls of the chamber, in such manner that a fluid passageway is formed between the chamber walls and base of the threads. The fluid passageway, thus in effect, is a continuous spiral beginning at the lower end of the plug and ending at its upper end. The annular spiral groove is intersected longitudinally by two series of grooves 7 and 7 respectively. These grooves are preferably plug is also pro-v 6 which extends. v

cific form o plugl havin a spiral thread disposed annularly thereo with Sets of longitudinal intake and discharge grooves 1ntersecting the annular thread, it is obvious that the same result may be obtained by forming a series of parallel grooves in place of the spiral grooves and it is also obvious that the annular spiral grooves may be of any relative degree of finness depending upon the grade of fluid to be filtered. Furthermore the plug while shown circular may be pol gonal in construction in some instances wit out departing from the spirit of my invention.

From the foregoing description it will be apparent that oil fed or forced through the duct 2 will as indicated by the arrows travel up through the intake grooves 7 from which l grooves it will disperse and travel radially in fine jets traveling through the annular grooves until such time as it enters the main discharge grooves, through which main discharge grooves it -Will be delivered to the point of consumption. Manifestly as the oil travels from the intake to the discharge grooves, through the fine threaded channel, any foreign particles will be trapped and the clean oil will thus be delivered to the spray nozzle whereby choking of the same is avoided. Should the plug become foul in time, it can be readily cleaned by removal or by forcing through it some other fluid under pressure.

What is claimed is:

1. A fluid filter comprisin a casing having a chamber therein provied with an inlet and discharge, an annular grooved plug fitted in the casing chamber having sets of longitudinal inlet and discharge grooves interrupting the annular grooves, the longitudinal sets of grooves being extended a predetermined dlstance from the opposite endsv ofsaid plug.

2. A flui filter comprising a casing having a chamber therein provided with an inlet and dischar an annular spiral grooved plug. fitted 1nto the casin having sets of longitudinal inlet and disc arge rooves of coarser cross sectional area than t e annular grooves, the coarser sets of grooves being extended a redetermined distance from the opposite en s of said plug.

3. A fluid filter comprisin a chamber having discharge and inlet ucts, a fluid passageway within the chamber, the same bein interrupted by annular grooves, whic annular grooves are intersected by longitudinal grooves that terminate at a predetermined dlstance from the opposite ends of the fluid passageway.

4. A fluid filter comprisin a casing having a chamber therein rovied with a cap closure, a plug or core tted into the chamber in contact with the walls thereof, a spiral thread surrounding the circumference ofthe plug or core and sets of longitudinal grooves interrupting the threads one of said sets being in communication with one end of the core and terminating a predetermined distance from the other end of said core and the other of lsaid sets interrupting the threads and in'communication with the opposite end of the core but terminating at a predetermined distance from the other end of the same.

In testimony that I claim the fore oing I have hereunto set my hand at Two ivers, in the county of Manitowocl and State of Wisconsin.

WM. R. KAHLENBERG. 

